Control patches for automatic single photo orientation
Journal
Photogrammetric Engineering and Remote Sensing
Journal Volume
72
Journal Issue
2
Pages
151-157
Date Issued
2006
Author(s)
Jaw, J.-J.
Abstract
Traditional aerial triangulation has long relied on control points for orientating the photo models into a ground-based coordinate system, reducing the distortion effect when tying photos by imperfect photo measurements, and calibrating camera parameters. Field surveys to provide an adequate number of control points and manual measurements of the control points afterwards in the photos incur considerable cost both in labor and expense. The past decade has seen the development of digital photogrammetry as a result of integrating into the photogrammetric discipline both the advantages of image processing techniques and the rapid computational efficiency of the computer. Such a development has made possible database-supplied control entities, as well as the automation of matching control data between object space and image space. Inspired by this capability, we employ a control patches database where the control points are found on older imagery and matched in the new photo. The successful implementation of the proposal lies in an effective control patches database, robust matching methodology, and a reliable orientation approach. Single photo resection is applied whenever no less than three matched control patches are available. The experiments under this project suggest the potential efficiency of automatic control point measurements from the control patches database and a reliable photo orientation solution.
SDGs
Type
journal article